
For bulk order, please contact sales@worldronemarket.com and we will provide the best service and price for you. Thank you! Dismiss
For other drone accessories, please visit our Store.
When using, please place the base station outdoors with enough sky coverage to get a good search signal. Place the base station on a stable and elevated platform, such as a tripod.
Please use pixhack special cable
If you are connected to other flight controller, select the C-RTK 9P (for V5+) kit, which contains wires that connect to other PX4 flight controls(it can be used to connect Pixhawk3 pro or other flight controls, normally you do not need to Modify the wire).
pin | C-RTK 9P(6 pin to 6pin cable) |
---|---|
1 | VCC |
2 | GPS_RX |
3 | GPS_TX |
4 | SCL |
5 | SDA |
6 | GND |
The following interface description is C-RTK Cable (for V5+ or V5 nano)
PIN | C-RTK GPS |
---|---|
Color | GND |
Green | TX(M8N GPS) |
Grey | RX(M8N GPS) |
Red | VCC(5V) |
Brown | GND |
Purple | SDA |
Blue | SCL |
Yellow | TX(RTK) |
White | RX(RTK) |
This tutorial uses the Mission Planner ground station software and the Arducopter-3.5 firmware. If you are using PX4 firmware and QGroundControl ground station software,Please read the PX4 RTK docs.
Please prepare the following hardware devices and perform hardware connection before use.
This is not necessary if you use C-RTK BASE.
If you use Ardupilot firmware to build an RTK differential system, you need to perform base station-side positioning configuration and data forwarding through the missionplanner. During the positioning configuration of the base station, there is no need to start the mobile station and drone.
The absolute geographic accuracy of the base station here will affect the absolute geographic accuracy of the mobile station without affecting the relative accuracy of the base station and the mobile station. If your application does not require drones with high absolute geographic accuracy, you don’t need to set the base station’s accuracy too high, resulting in longer search times. Even if the accuracy of the base station is 1.5~2m, the positional accuracy of the mobile station relative to the base station can still reach the centimeter level.
After the C-RTK 9P base station search star is completed, the Mission Planner will display the following page:
The figure below shows that the indicator of the base station status is displayed in green, while the three satellite systems of GPS, Glonass and Beidou are displayed in green. The box on the right shows the status as Position is valid and displays the current latitude and longitude.
Using the paired digital transmission module to connect to the same Mission Planner ground station, the data of the base station will be transmitted to the C-RTK rover station on the drone through the data transmission module. On the main page of Mission Planner, you can see that the current GPS status of the drone is displayed as RTK Float/RTK Fixed/3D RTK, indicating that the UAV’s positioning has entered the RTK state.
RTK Fixed has higher accuracy and is extremely environmentally demanding, and positioning can enter the RTK Fixed state when the signal is good enough。
Real-time motion (RTK) increases the accuracy of GNSS / GPS systems to the centimeter level. RTK makes PX4 can be used for precision measurement and other precision measurement.
Please prepare the following hardware devices and perform hardware connection before use.
The aircraft must be connected to the ground station via data / communication links. The link must use the MAVLink2 protocol because it can use the channel more efficiently. This should be set by default, but if not, follow the MAVLink2 configuration instructions below.
RTK GPS connection is essentially plug and play:
Note: When the C-RTK GPS device is connected (except for the normal GPS status icon), the C-RTK GPS status icon will be displayed in the top icon bar. When RTK is set, the icon is red, and once the RTK GPS is in the survey complete state, the icon will turn white.
You can click the icon to see the current status and RTK accuracy.
Once the survey is completed:
The C-RTK GPS icon turns white and QGroundControl begins transmitting position data to the aircraft:
Aircraft GPS switched to RTK mode. The new mode is displayed in the normal GPS status icon (3D RTK GPS lock):
The following settings may need to be changed (using QGroundControl)
C-RTK 9P GPS Settings Specified in QGroundControl General Settings (SettingsView & gt; General Settings)
These settings define the minimum duration and minimum accuracy (referred to as “measurement input”) to complete the C-RTK GPS setup process.
The MAVLink2 protocol must be used because it can use lower bandwidth channels more efficiently. This should be enabled by default in recent builds.
To make sure MAVLink2 is used:
Update telemetry module firmware to the latest version(Please refer to QGroundControl>seting >firmware).
Set MAV_PROTO_VER to 2(Please refer toQGroundControl seting >parameter)
You may also need to adjust some of the parameters, because the default parameters are adjusted in meters instead of centimeters. For example, you can reduce EKF2 _GPS_V_NOISE and EKF2_GPS_P_NOISE to 0.2.